Safety blade sharpener



June 18, 1935. I R. H. WHITE SAFETY BLADE SHARPENER 2 Sheets-Sheet l RIQ Filed Jan. 26, 1934 0 0 m N Q mu ,2 Z s 0 .2 m 0 3 WQ Q36 .3 F1 a. g \F U Q N. Q 0 n A v 0 Q Q 0 d0 2 3 .0 B 03 3 l/VVHVTO/E: 451. W

June 18, 1935. R. H. WHITE SAFETY I B LADE SHARPENER Filed Jan. 26, 1934 2 Sheets-Sheet, 2

l/WE 0 @74 wrrw Patented June 18, 1935 .zsoaz t SAFETY BLADE SHARPENER Reginald Henry White, Toronto, Ontario, Canada Application January 26,

1934, Serial, No. 708,383-

3 Claims. (or. 51 '159) My invention relates to improvements in safety blade Sharpeners, and the principal object of the invention is to automatically reverse a two-edged razor blade to be honed so that the underside of .5 one cutting edge and the upper side of the op posed cutting edge will be successively acted upon while the blade is moved in a given direction, and a like action takes place in respect of the other sides of said opposed cutting edges when i the blade is moved in reversed direction, thereby insuring that. said sides will always be presented to the abrading elements at a common angle. Another object is to mount the abrading elements in spaced relation and preferably so that they may move slightly on theirlongitudinal axes to compensate for any tilting or rocking motion that might arise in the carriage adapted to support the blade, thus insuring that substantially uniform pressure will be exerted longitudinally of each cutting edge undergoing sharpening. Another object is to construct the supporting means for the abrading elements so that the same may be hinged together, and when closed, form a casing for the blade carriage and the'said abrading elements, and in the following speciii cation and the drawings forming part thereof; I shall describe and illustrate my pr'eferredform of invention, and what I claim as new will be set forth in theclaims forming part of this: specification.

It is a further important object of the invention to provide a device that will present the edges to be honed to the abrading elements at a common angle without the necessity of having.

to manually invert the blade-holding means.

Fig. 1 is a plan view of themajor portions of two opposed spaced abrading elements suitably mounted, and a suitable carriage supporting a two-edged blade. Fig. 2 is across section on the line 2-2, Fig. 1. Fig. 3 is a plan view of the blank from which the axle for the blade carriage is formed. Fig. 4 is a cross section on theline 44, Fig. 1, through the, blade carriage, and a longitudinalsection through the bottom portion of the supporting means for the abrading. elements. This view shows supporting plates for the said abrading elements, in side elevation, and the action of the blade carriage in reversing the position of the blade as the carriage carries it from one abrading element to the other. Fig. 5

is a side elevation of a portion of each supporting member for the abrading elements showing a suitable manner in which the same are hinged together, and Fig. 6 is an end elevation of the right-hand end of Fig. 5.

In-the drawings, like characters ofreference refer to the same parts.

2 are abrading elements otherwise known as bones, and the same are suitably carried by supporting members 3. These members are prefertle.

Fig. 5. .To one of themembers ,3 is secured at each side a hinge element 4, andqto the .other member 3 is also secured atv each side ahinge element v5,. 'The'pintle 6 mounted in each pair of hinged elements is located therein. sothat the axis thereof will 'be in alignment with. the plane represented by. the lines! so that when the supporting members 3. are opened. out intothesposltion shown in Figs. land. 4:, the'floor'sB oi "said supporting members, will occupy thesame plane and abut at their opposed edges; :As shown clearly in Figs. 4 and 5, portions of the sidewalls 9;of

said supporting, members are removed as shown at [D to provide for the positioning'ofl the pin It is not absolutely essential to; hinge the said supporting members together, because other means may be designed to hold these said sup.- porting members and theabrading elements carried thereby in proper foo-operative relationship.

This device is adaptedtoish'arpen the opposed cutting edges of a blade 12 having aligned apertures formed therein at a point substantially midway said cutting edges. The: blade carriage embraces a blade-holding plate 1.3 formedfro'm a blank,- and the ends l4 and I4. of thisplate. are

given a cylindrical form. to form axlew endsxl5.

The said plate is also provided with a, pair of cars, 16, and when these are bentinto proper position they support between them. thehead ll of a plate tact with the plate 23. headfll and ears i6. [The plate 13 is provided with a pair of 'spacedbosses lfllocated the plate 18. 23.,is "a bolt" cylindrical inform mounted to operate in the-axle end formed by the end l4 oi theplatc l3,,and this bolt is provided with a lip124 which engages the outer. end of the plate 18 to holdit in closed position. The plate I4 is provided with a lug which is bent inwardly. The bolt 23. is cut away as shown at 26. a suitable distance so that this bolt maybe moved v longitudinally within its associateda de end to permit the engagement and disengagement of the lip 24 in respect'of the plate [8, as will be and engages the surface 21 of the cut-away. DOI- tion ot the bolt 23 thereby preventing the axial movement of said bolt so as to maintain the lip 24' always in position to engage the end of the plate 'I 8 when the parts are inthe position'shown in Figs. 1 and 2. The inner end of: the cut-away portion of the bolt 23 will contact with the-in.- ner side of the lug 25 to prevent the complete withdrawal of saidbolt. i s 5 {8 which is adapted toJpress down upon the blade l2 and holdit'tincon- Hills the pin held in the :vably'hinged, together as shown; particularly in M understood. ,The edge a of the lug Z5. is straight,

Mounted on each of the axle ends I5 is a friction wheel 28. The hubs of these wheels tightly embrace the said axle ends, and it will be noticed upon referring particularly to Fig. 2 that these friction wheels rest in contact with the upper surfaces of the race ways 29, formed in the supporting members 3, and one at each side thereof. Obviously when the said supporting members occupy the position shown in Figs. 1 and 4, they are in alignment. Any suitable handle is provided for the blade carriage. Each inner end of the handle b illustrated is mounted on its associated axle end as shown at 30, and of course these axle ends have free movement within the supported ends of said handle.

The abrading elements 2, when the parts are in the position shown in Figs. 1 and 4, must of course be in alignment, and the upper surfaces thereof occupy substantially the same plane. The means preferred to support the said abrading elements embraces a plurality of spaced bowshaped resilient members 3| positioned transversely of each abrading element. The ends of these members. 3! are suitably fastened to the said supporting members as shown at c, and the said resilient members are suitably coupledeither to the said abrading elements along the longitudinal axes thereof, or to metal plates at supporting said abrading elements, as shown at c, Fig. 2. The manner of supporting said abrading elements permits them to rock on their longitudinal axes to respond to any corresponding rocking movement that may originate in the blade carriage so as to insure a uniform pressure being exerted longitudinally of each cutting edge undergoing sharpening.

In practice, the blade to be sharpened is placed between the plates 13 and I8, and then the friction wheels 28 are placed in the race ways of one of the supporting members 3, near the outer end of the associated abrading element, and as the blade carriage is moved in the direction indicated by arrow 1, Fig. 4, the underside of the forward cutting edge of the blade will be moved into contact with its associated abrading element. In due course, as the cutting edge undergoing. sharpening is moved out of contact with theupper surface of the abrading element the the blade so that it is brought into contact with the upper surface of the other abrading element beyond the edge 2' thereof, and as movement continues in the direction indicated by arrow 7', the contacting side of the cutting edge of said blade undergoes sharpening. It will be observed that the axis of the blade carriage is well spaced above the upper surface of each of the abrading elements and therefore when the blade carriage is started to retrace its path, the friction wheels 28 move the blade into contact with the upper surface of the associated abrading element, (as occurred at the start of the cycle being described) at which time further axial movement of said wheel ceases as the carriage is moved in the direction indicated by arrow is, sharpening continues until the forward edge of the blade escapes the edge 1' when the action before described takes place and the position of the blade is inverted so that the side I of the blade l2 will be brought into contact with the other abrading element, thus completing the cycle of bringing both sides of both cutting edges into contact with the said abrading elements.

The flanges m of the race ways 29 act as guides for the friction wheels.

The supporting members are preferably made of metal, and when they are placed one upon the other as shown in Fig. 2, they form a casing in which is contained the blade carriage and its handle.

While I have described what I consider to be the best embodiment within my invention, it must be understood that the principle thereof may be embodied in various other forms without departing from the spirit of my invention and the scope of my claims.

What I claim as my invention is:

1. In combination, a pair of rigid longitudinally aligned coupled supports providing fiat trackagc at each side thereof, bow-shaped resilient members secured to the supports and extending transversely thereof, a pair of longitudinally aligned abrading elements having their upper surfaces in a common plane mounted on the resilient mem ber, respectively above a support and of less length and breadth than the supports, the opposite side edges of the abrading elements being disposed inwardly of the adjacent trackage, and a blade carriage movable over the trackage adapted to move a blade in contact with the abrading elements, the resilient members supporting the abrading elements permitting the latter to yield to pressure in a direction transversely of the path of travel of the carriage.

2. In combination, a pair of rigid longitudinally aligned coupled supports having their upper surfaces in the same plane and providing fiat trackage at each side thereof, bow-shaped resilient members secured to the supports and extending transversely thereof, a pair of longitudinally aligned abrading elements having their upper surfaces in a common plane mounted on the resilient member, respectively above a support and of less length and breadth than the supports, the opposite side edges of the abrading elements being disposed inwardly of the adjacent trackage, a blade carriage movable over the trackage adapted to move a blade in contact with abrading elements, the resilient members being secured at their ends to the supports and the abrading elements being secured to the resilient members midway the ends of the latter at the longitudinal axes of the abrading elements to allow the same to rock on their longitudinal axes to respond to like movements imparted thereto.

3. In combination, a pair of coupled alined supports, an abrading element located over each support with their upper faces in substantially the same plane, spring members interposed between the supports and abrading elements and engaged with the latter at their longitudinal axes whereby the abrading elements may rock on their longitudinal axes in response to pressure thereon, a wheeled blade carriage having the wheels thereof movable over the support at opposlte sides or" the abrading elements and presenting a blade to said abrading elements, the carriage embodying an axle, the Wheels adapted to frictionally slide on the support when a blade is engaged with an abrading element and said abrading elements being arranged in spaced relation whereby the rotation of the wheels effects rotation of the axle and reversal of the blade when the carriage moves to position the blades between adjacent ends of the abrading elements for presenting another edge of the blade to the succeeding abrading element.

REGINALD H. WHITE. 

